Invention Grant
- Patent Title: Filter device
- Patent Title (中): 过滤装置
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Application No.: US34204840Application Date: 1940-06-24
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Publication No.: US2306985APublication Date: 1942-12-29
- Inventor: TOLMAN JOHN A
- Applicant: TOLMAN JOHN A
- Assignee: John A Tolman
- Current Assignee: John A Tolman
- Priority: US34204840 1940-06-24
- Main IPC: B01D29/00
- IPC: B01D29/00 ; B01D35/02
Information query
